CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		3 Months Ended						9 Months Ended
		Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income		$ 13,478	$ 4,651	$ 6,101	$ 974	$ (175)	$ 6,964	$ 24,230	$ 7,763
Comprehensive income:
Unrealized gain on derivative financial instruments		490			911			6,001	2,681
Amortization of interest rate contracts	[1]	188			188			564	564
Total comprehensive income		678	$ 1,935	$ 3,952	1,099	$ 1,048	$ 1,098	6,565	3,245
Comprehensive income		14,156			2,073			30,795	11,008
Comprehensive income attributable to noncontrolling interest		(39)			(12)			(79)	(59)
Comprehensive income attributable to Brandywine Realty Trust		$ 14,117			$ 2,061			$ 30,716	$ 10,949

[1] Amounts reclassified from comprehensive income to interest expense within the Consolidated Statements of Operations.